Bizarre, gelatinous, and glowing jellyfish-like organisms known as a pyrosomes are showing up in massive numbers never before recorded off the U.S. West Coast. And marine scientists are completely stumped as to why. "It's really weird," Jennifer Fisher , a faculty research assistant with Oregon State University's Hatfield Marine Science Center, told National Geographic . "I've never seen anything like it." Pyrosomes are actually colonies of hundreds or even thousands of tiny harmless creatures called zooids. They're all clones, with each individual capable of copying itself, and work together in unison to move through and filter the water for plankton. While some pyrosome colonies reach no larger than 2 feet, others, such as the magnificent one below , have been discovered in excess of 60 feet; with a filter mouth capable of swallowing a full grown human. And yes, they glo...